CADASTRAL AREA WORKBENCH

From map lines to decimal area.

Upload a mauza map, find or trace plots, then read the area in decimal, katha, dhur, bigha, acre and square feet. Pan, zoom, rotate, drag corners, divide plots and save your work.

1Map

Choose map PDF or imageor drop a file here · PDF, JPG, PNG · max 40 MB📷 Photograph a map

2Find plot

Finds the number in the PDF text and follows the closed boundary around it. Names are used for traced plots too.

3Map scale1:3960

Bihar cadastral sheets are usually 1:3960 (16 inch = 1 mile) or 1:4000. Confirm from the sheet legend, or calibrate each map by a known distance or area.

Unitsft · decimal

LengthMap label

Local katha / bigha

sq ft / kathadhur / kathakatha / bighaft / lattha

Map sheets0

Add more PDF pages, sheets or photos on top of the base map. Align them, then measure across the combined map or compare overlaps.

+ Add sheet (PDF or image)

Georeference (GPS)0 points

Two or more GPS points tie the map to real coordinates: plots get latitude/longitude, the scale can come from GPS, and everything exports to KML for Google Earth.

LatitudeLongitude

GPS walk

Walk the boundary with the phone: press Start, stand on each corner and press Mark corner. The area is computed from the GPS positions; with a georeferenced map it can also be added as a plot.

100%

EXAMPLE PLOT1747upload yours to begin

NO MAP NEEDED

Area calculator & unit converter

ShapeLength unit

North sideEast sideSouth sideWest sideDiagonal (NE corner to SW corner)

Enter every side length to see the area in all units.

SAVED IN THIS BROWSER

Recent projects

Work is saved automatically with the map file. Open a project to continue where you left off.

No saved projects yet. Trace or detect a plot and it will appear here.

Bhulekh PDF link helper

DIRECT FILE HELPER

Find the PDF behind a viewer

Paste one document-viewer URL, or paste an advanced-search results URL to extract every PDF across all result pages.

One-time Chrome setup: Download the Chrome helper, unzip it, open chrome://extensions, enable Developer mode, and choose Load unpacked. Select the unzipped folder, then refresh this page. The URL box will then use your logged-in Bhulekh session.

Mauza Measure · Area report

· Scale: 1:3960 · 6/9/2026, 4:32:19 am

Plot	corners	decimal	katha · dhur	sq ft	sq m	Perimeter

Local units: 1 katha = 1361.25 sq ft = 20 dhur; 1 bigha = 20 katha. Area from a raster scan is an estimate. Always verify the scale and boundary against an official survey record before legal use.

Keyboard shortcuts & help

Load a map, find or trace plots, set the scale, then read areas, divide plots and print a report. Everything stays in this browser.

`V`	Pan / select
`D`	Draw corners
`A`	Auto-detect a plot
`R`	Ruler
`C`	Cut the selected plot
`F`	Fit whole map
`L`	Show / hide labels
`Ctrl+Z / Ctrl+Y`	Undo / redo
`Esc`	Back to Pan; finish or cancel a drawing
`Enter`	Finish the polygon
`Delete`	Remove the selected corner or the last cut point
`Arrow keys`	Nudge the selected corner (Shift: 10 px)
`Space + drag`	Pan in any tool
`Wheel / pinch`	Zoom
`Double-click`	Zoom in (Pan) or finish (Draw)
`Right-click`	Remove a corner, cut point or division line